{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "Within the last several years , previously rare liver tumors have been seen in young women using oral contraceptive steroids ."}
{"Chemical": ["oral contraceptive", "steroids"], "Disease": ["liver tumors"]}